The British Columbia Ministry of Environment is preparing water quality assessments and objectives in priority water basins in British Columbia. This report describes the water quality within certain selected tributaries to the central portion of Okanagan Lake on its west shore. Presented in the report are data collected to April 1988. The objectives are being developed for tributaries to Okanagan Lake as part of a fisheries management plan. As well, objectives are required for Peachland and Trepanier Creeks to be used in conjunction with mine abandonment plans for Brenda Mines.